Vim script for text filtering and alignment

Sometimes, it's useful to line up text. Naturally, it's nicer to have the
computer do this for you, since aligning things by hand quickly becomes
unpleasant. While there are other plugins for aligning text, the ones I've
tried are either impossibly difficult to understand and use, or too simplistic
to handle complicated tasks. This plugin aims to make the easy things easy and
the hard things possible, without providing an unnecessarily obtuse interface.
It's still a work in progress, and criticisms are welcome.